Thanks for your messages.
The number of tea drinkers in France is growing little by little. Fifteen years ago, finding loose teas (I don't know if the expression is correct: is loose tea the opposite of teabags?) was very difficult: you had only some very expensive shops (épiceries de luxe) whose tea wasn't worth the money they asked for it and some Twinings and Lipton boxes.
Now you can get decent teas in specialized shops, and of course very good teas via internet.

Palais des thés is OK for black teas, chinese greens, but not for japanese greens due to lack of freshness. For oolongs and puer I prefer to shop directly from Taiwan.
There aren't many tea blogs from France. Only puer enthusiasts opened their blogs. They are very well documented and very pleasant to read. But I dont think puer is the favourite tea in France, even among "serious" tea drinkers.